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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff343913e326bb8b286680bdb9b344f9ab22c6002f6d5bfd45f30b21548a6cb3' 
  AND token = 'CGcyIKxUe3oFOegPuqla0KL6182msjuVMw9yRpDwBGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}